Knife clamp



FIG. 1 is an isometric view of a top, front, and left side of a new ornamental design for a knife clamp;

FIG. 2 is a top view of the knife clamp of FIG. 1;

FIG. 3 is a bottom view of the knife clamp of FIG. 1;

FIG. 4 is a left side elevational view, the right side elevational view being a mirror image thereof, of the knife clamp of FIG. 1;

FIG. 5 is a front elevational view of the knife clamp of FIG. 1; and,

FIG. 6 is a rear elevational view of the knife clamp of FIG. 1.

Portions of the design shown in broken line represent portions of the knife clamp that form no part of the claimed design. 

CLAIM The ornamental design for a knife clamp, as shown and described herein. 